顺应四时
参考答案：
指人们生活在自然环境中，必须要遵循一年四季的气候及一日四时天气的变化规律。
在一个容量为15的循环队列中，若头指针front=6，尾指针rear=9，则该循环队列中共有______个元素。
_______ avoid possible embarrassment, Tom ______ignores her former girlfriend whenever he sees her. [ ]
A. In order to; deliberately
B. As to; intentionally
C. So as to; purposely
D. So that to; on purpose
